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Chapter 1: Q25 (page 11)

What鈥檚 Wrong? In Exercises 25鈥�28, identify what is wrong.

Potatoes In a poll sponsored by the Idaho Potato Commission, 1000 adults were asked to select their favorite vegetables, and the favorite choice was potatoes, which were selected by 26% of the respondents.

Short Answer

Expert verified

The Idaho Potato Commission conducted the survey, which resulted in 26% of the respondents favoring the vegetable potato.

Step by step solution

01

Given information

The number of adults surveyed for their favorite vegetable was 1000. The survey was sponsored by the organization Idaho Potato Commission.

Results of the survey: 26% chose potato as their favorite vegetable.

02

The sampling procedure 

The survey looks for the most favorite vegetable in the population. Among the 1000 selected sample adults, 26% opted for potato.

It is further known that a potato commission sponsored the survey.

03

Identifying the wrong element in the survey

The results are very likely to be biased in the survey.

The responses of 26% for potatoes are significantly high, but it seems to be biased as the poll was conducted in the sponsorship of an organization that deals in potatoes.

Thus, there are high chances that the results are biased in the study.

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Most popular questions from this chapter

In Exercises 21鈥�24, refer to the data in the table below. The entries are white blood cell counts (1000 cells,ML) and red blood cell counts (million cells,ML) from male subjects examined as part of a large health study conducted by the National Center for Health Statistics. The data are matched, so that the first subject has a white blood cell count of 8.7 and a red blood cell count of 4.91, and so on.

Subject


12345
White8.75.97.36.25.9
Red4.915.594.444.85.17

Context Given that the data are matched and considering the units of the data, does it make sense to use the difference between each white blood cell count and the corresponding red blood cell count? Why or why not?

In Exercises 9鈥�12, determine whether the sampling method appears to be sound or is flawed.

Credit Card Payments In an AARP, Inc. survey of 1019 randomly selected adults, each was asked how much credit card debt he or she pays off each month.

Determine whether the data are from discrete data or continuous data set.

McDonald鈥檚 In a study of service times at a McDonald鈥檚 drive-up window, the numbers of cars serviced each hour of several days are recorded.

Correlation. One study showed that for a recent period of 11 years, there was a strong correlation (or association) between the numbers of people who drowned in swimming pools and the amounts of power generated by nuclear power plants (based on data from the Centers for Disease Control and Prevention and the Department of Energy). Does this imply that increasing power from nuclear power plants is the cause of more deaths in swimming pools? Why or why not?

Discrete/ Continuous Data Which of the following describe discrete data?

a. The numbers of people surveyed in each of the next several years for the National Health and Nutrition Examination Surveys.

b. The exact foot lengths (measured in cm) of a random sample of statistics students.

c. The exact times that randomly selected drivers spend texting while driving during the past 7 days.
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